-----------------------------------------------------------------------	                            MODIFICATION LEVEL SUMMARY

          Product Code         P/N                       Product Type 8PIO      
          Page 1 of 1          Date Issued 08/01/83      Revision E1          
        =======================================================================	          Mod Level 1      Reference #              Date Released 03/31/81
        -----------------------------------------------------------------------	          Change: 1) IC31 should not be a TI 74LS04.
                  2) Other vendors (National, etc.) will suffice.
                  3) P/N 010-0066.

          Reason: 1-3) TI 74LS04 is too sensitive to ground spikes, which can
                       cause false latching of input latched status flip-flops.